9

I want to change my default encoding system from non defined to UTF-8 (I think that would be useful). Now I have seen many different UTF-8 coding systems:

mule-utf-8        mule-utf-8-dos
mule-utf-8-mac    mule-utf-8-unix
prefer-utf-8      prefer-utf-8-dos
prefer-utf-8-mac  prefer-utf-8-unix
utf-8             utf-8-auto
utf-8-auto-dos    utf-8-auto-mac
utf-8-auto-unix   utf-8-dos
utf-8-emacs       utf-8-emacs-dos
utf-8-emacs-mac   utf-8-emacs-unix
utf-8-hfs         utf-8-hfs-dos
utf-8-hfs-mac     utf-8-hfs-unix
utf-8-mac         utf-8-unix
utf-8-with-signature     utf-8-with-signature-dos
utf-8-with-signature-mac utf-8-with-signature-unix

I am using a Mac and I am further confused about these different hfs and mac coding systems.

At the moment I decided to use utf-8 as follow based on this answer:

(setq utf-translate-cjk-mode nil) ; disable CJK coding/encoding (Chinese/Japanese/Korean characters)
(set-language-environment 'utf-8)
;; (set-keyboard-coding-system 'utf-8-mac) ; For old Carbon emacs on OS X only
(setq locale-coding-system 'utf-8)
(set-default-coding-systems 'utf-8)
(set-terminal-coding-system 'utf-8)
(unless (eq system-type 'windows-nt)
  (set-selection-coding-system 'utf-8))
(prefer-coding-system 'utf-8)

But I would like to understand some more what I am doing and why another utf-8 would be better as a default coding system?

  • 1
    This answer provides good background on different utf-8 variants. – Juancho Jun 30 '15 at 14:01
  • I don't see utf-8-hfs and friends on my emacs, but there is utf-8-nfd instead. That is the encoding used by OS X to encode filenames. NFD is for Normalized Form Canonical Decomposition. NFC is more commonly used (C is for Composition). One difference is that a letter like å is encoded as a single code point in NFC, but two in NFD (the letter a followed by a composing character for the ring above). You should probably forget about these encodings; just hope that filenames are automagically encoded correctly anyhow. – Harald Hanche-Olsen Jul 1 '15 at 11:01
  • @Juancho Thanks - so I assume that, that I am OK when I use the utf-8 as a general setting. Thanks. – Rainer Jul 1 '15 at 12:19
  • @HaraldHanche-Olsen OK - As I am only using ASCII for file names, I should be OK then. Thanks. – Rainer Jul 1 '15 at 12:19
  • 2
    AFAIK, utf-8 is the coding system used under macos for most things, and Emacs should already pick its coding systems accordingly for you. IOW, I think you should need no configuration at all. Please clarify why you "want to change my default encoding system". Maybe you're simply hitting an Emacs bug. – Stefan Nov 27 '17 at 16:20
0

Emacs has [Menu]->[Options]->[Multilingual Environment]->[Describe Coding System...] or C-h C to explain the difference and disambiguate the different coding systems.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.